Uttam Shikhar, Bista Rajan K, Staton Kevin, Alexandrov Sergey, Choi Serah, Bakkenist Christopher J, Hartman Douglas J, Brand Randall E, Liu Yang
Biomedical and Optical Imaging Laboratory (BOIL), Departments of Medicine and Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213, USA.
Biomed Opt Express. 2013 Apr 1;4(4):596-613. doi: 10.1364/BOE.4.000596. Epub 2013 Mar 22.
We present depth-resolved spatial-domain low-coherence quantitative phase microscopy, a simple approach that utilizes coherence gating to construct a depth-resolved structural feature vector quantifying sub-resolution axial structural changes at different optical depths within the sample. We show that this feature vector is independent of sample thickness variation, and identifies nanoscale structural changes in clinically prepared samples. We present numerical simulations and experimental validation to demonstrate the feasibility of the approach. We also perform experiments using unstained cells to investigate the nanoscale structural changes in regulated cell proliferation through cell cycle and chromatin decondensation induced by histone acetylation.
我们提出了深度分辨空间域低相干定量相显微镜技术,这是一种简单的方法,利用相干选通来构建深度分辨结构特征向量,以量化样品内不同光学深度处的亚分辨率轴向结构变化。我们表明,该特征向量与样品厚度变化无关,并能识别临床制备样品中的纳米级结构变化。我们通过数值模拟和实验验证来证明该方法的可行性。我们还使用未染色的细胞进行实验,以研究通过组蛋白乙酰化诱导的细胞周期和染色质解聚在细胞增殖调控中的纳米级结构变化。